# Nepal Ilam Tea (Camellia sinensis 'Nepal Ilam')

**Canonical URL:** https://ingredients.hermeticasuperfoods.com/ingredients/nepal-ilam-tea
**Data Source:** Hermetica Superfoods Ingredient Encyclopedia
**Updated:** 2026-04-02
**Evidence Score:** 2 / 10
**Category:** Tea Cultivars
**Also Known As:** Camellia sinensis 'Nepal Ilam', Ilam tea, Nepali Ilam tea, Nepal tea cultivar, Ilam district tea, Camellia sinensis Nepal Ilam cultivar

## Overview

Nepal Ilam Tea is a high-altitude Camellia sinensis cultivar grown in the Ilam district of Nepal, prized for its elevated catechin content, particularly epigallocatechin gallate (EGCG), which acts as a potent antioxidant by scavenging [reactive oxygen species](/ingredients/condition/antioxidant) and inhibiting pro-[inflammatory](/ingredients/condition/inflammation) enzymes. While no clinical trials isolate this specific cultivar, its bioactive profile mirrors high-quality Darjeeling-type first-flush teas with comparable polyphenol concentrations.

## Health Benefits

• No clinical evidence exists specifically for Nepal Ilam Tea cultivar
• General C. sinensis green tea shows [antioxidant](/ingredients/condition/antioxidant) effects via catechins like EGCG (117-442 mg/L in infusions) - evidence quality: moderate for general green tea
• Contains caffeine (2-5% dry weight) for potential stimulation effects - evidence quality: established for general tea
• Provides theanine (60% of total amino acids) which may modulate [neurotransmitter](/ingredients/condition/cognitive)s - evidence quality: preliminary for general tea
• Rich in minerals including potassium (92-151 mg/L), calcium (1.9-3.5 mg/L), and fluoride (0.80-2.0 mg/L) - evidence quality: compositional data only

## Mechanism of Action

EGCG in Nepal Ilam Tea inhibits catechol-O-methyltransferase (COMT) and modulates NF-κB signaling, reducing [pro-inflammatory cytokine](/ingredients/condition/inflammation) expression including TNF-α and IL-6. Caffeine (2–5% dry weight) non-selectively blocks adenosine A1 and A2A receptors, promoting wakefulness and enhancing [dopamine](/ingredients/condition/mood)rgic neurotransmission. L-theanine, co-present in the leaf matrix, modulates GABA-A receptors and increases alpha-wave brain activity, partially attenuating caffeine-induced adrenergic stimulation.

## Clinical Summary

No randomized controlled trials exist specifically evaluating the Nepal Ilam cultivar; available evidence is extrapolated from general Camellia sinensis green tea research. Meta-analyses of green tea interventions (pooling studies of 30–1000+ participants) report modest reductions in [LDL cholesterol](/ingredients/condition/heart-health) (approximately 2–5 mg/dL) and fasting [blood glucose](/ingredients/condition/weight-management) with regular consumption of 3–5 cups daily. EGCG concentrations of 117–442 mg/L in brewed infusions have been associated with measurable increases in plasma [antioxidant](/ingredients/condition/antioxidant) capacity in short-term human trials lasting 4–12 weeks. Evidence quality for cultivar-specific claims remains very low, and results from general green tea studies should not be uncritically applied to Nepal Ilam Tea.

## Nutritional Profile

Nepal Ilam Tea (Camellia sinensis 'Nepal Ilam') is a high-altitude Darjeeling-adjacent cultivar from eastern Nepal, consumed primarily as a brewed infusion. Macronutrient contribution per standard 240ml cup is negligible: <2 kcal, ~0g fat, ~0.4g carbohydrates, ~0.1g protein. Key bioactive compounds (extrapolated from high-altitude C. sinensis cultivar data, as Ilam-specific assays are limited): Catechins total: estimated 150-400mg/L in infusion, including EGCG (epigallocatechin gallate) ~80-200mg/L, EGC ~30-80mg/L, ECG ~20-60mg/L, EC ~15-40mg/L — high-altitude growing conditions (1000-2100m elevation in Ilam district) generally elevate polyphenol concentrations relative to lowland teas due to increased UV exposure and slower leaf development. Caffeine: ~2-4% dry leaf weight, yielding approximately 30-60mg per 240ml cup depending on steeping time and water temperature. L-Theanine: approximately 25-60mg per cup (representing ~60% of total free amino acids), with theanine:caffeine ratio typically 1:1 to 1:2, supporting potential synergistic calm-alertness effect. Theaflavins and thearubigins: present in oxidized preparations (black/oolong processing), estimated 20-80mg/L theaflavins; absent or trace in minimally oxidized versions. Fluoride: 1-3mg/L per infusion (established for high-altitude C. sinensis). Manganese: approximately 0.4-1.0mg per cup (bioavailability moderate, ~5-10% absorbed). Potassium: ~30-50mg per cup. Vitamin K (phylloquinone): trace amounts in infusion, <5mcg per cup. Volatile aromatic compounds contributing to Ilam's characteristic muscatel/floral notes include geraniol, linalool, and 2-phenylethanol — concentrations region-specific but not clinically quantified for Ilam specifically. Polyphenol bioavailability is moderate; catechin absorption ranges 20-30% in humans, enhanced by avoiding milk co-consumption. No Ilam cultivar-specific nutritional assays are publicly available in peer-reviewed literature as of 2024; values represent informed extrapolation from comparable high-altitude Darjeeling and Nepalese tea cultivar data.

## Dosage & Preparation

No clinically studied dosage ranges are available for Nepal Ilam Tea, as no human trials specific to this cultivar exist. For general C. sinensis green tea infusions, typical preparations use 2-3 g of dried leaves per 200-250 mL water, yielding catechin levels like EGCG at 117-442 mg/L, but without standardization data for this variant. Consult a healthcare provider before starting any new supplement.

## Safety & Drug Interactions

Nepal Ilam Tea is generally safe at typical dietary intake levels (2–4 cups per day), but its caffeine content (approximately 30–70 mg per cup) may cause [insomnia](/ingredients/condition/sleep), tachycardia, or anxiety in sensitive individuals or at high doses. EGCG at supplemental doses exceeding 800 mg/day has been linked to hepatotoxicity in rare case reports, though brewed tea at normal volumes poses minimal risk. Green tea catechins can reduce intestinal absorption of iron from non-heme sources and may interact with warfarin, potentially altering INR values; patients on anticoagulants should consult a healthcare provider. Consumption is not recommended during pregnancy beyond 1–2 cups daily due to caffeine exposure and theoretical effects of high-dose catechins on folate [metabolism](/ingredients/condition/weight-management).

## Scientific Research

No clinical trials, RCTs, or meta-analyses specific to Nepal Ilam Tea (Camellia sinensis 'Nepal Ilam') were identified in the available sources. General Camellia sinensis green tea studies exist on catechins for metabolic effects, but none reference this cultivar by name or origin, precluding cultivar-specific evidence. No PMIDs were provided in the research dossier for any studies.

## Historical & Cultural Context

Nepal Ilam Tea, as a Camellia sinensis cultivar, lacks documented historical use specific to Nepal Ilam in traditional medicine systems within the sources. General C. sinensis tea has been used in Chinese traditional medicine for millennia for [digestion](/ingredients/condition/gut-health), stimulation, and [antioxidant](/ingredients/condition/antioxidant) effects, but no Nepal-specific context (e.g., Ayurvedic or local systems) is provided.

## Synergistic Combinations

Quercetin, piperine, vitamin C, L-theanine, green tea extract

## Frequently Asked Questions

### What makes Nepal Ilam Tea different from regular green tea?

Nepal Ilam Tea is grown at elevations above 1,000 meters in the Ilam district of eastern Nepal, where cooler temperatures slow leaf growth and concentrate polyphenols, producing a flavor and catechin profile comparable to first-flush Darjeeling teas. The high-altitude terroir may increase EGCG and L-theanine concentrations relative to lowland Camellia sinensis varieties, though no peer-reviewed comparative analyses have quantified this cultivar specifically. It is not a genetically distinct species but a regionally adapted cultivar of Camellia sinensis.

### How much EGCG is in a cup of Nepal Ilam Tea?

Exact EGCG measurements for the Nepal Ilam cultivar are not available in published literature, but brewed infusions of comparable high-quality green teas contain approximately 117–442 mg/L of total catechins, with EGCG typically comprising 50–60% of that fraction. A standard 240 mL cup would therefore deliver roughly 60–265 mg of EGCG depending on steep time, water temperature, and leaf quality. Longer steeping at higher temperatures (80–90°C for 3–5 minutes) extracts more catechins but also more caffeine and tannins.

### Does Nepal Ilam Tea help with weight loss?

There is no clinical evidence specifically for Nepal Ilam Tea and weight loss. General green tea research shows that EGCG combined with caffeine can modestly increase resting energy expenditure by approximately 4% and fat oxidation in short-term studies, with thermogenic effects mediated partly by COMT inhibition extending norepinephrine signaling. However, pooled clinical trial data suggest the average weight reduction from green tea supplementation is minimal (0.5–1.5 kg over 12 weeks), and sustained caloric restriction remains far more impactful.

### Is Nepal Ilam Tea safe to drink every day?

Daily consumption of 2–4 cups of brewed Nepal Ilam Tea is considered safe for healthy adults, delivering moderate caffeine (approximately 30–70 mg per cup) and dietary levels of EGCG well below thresholds associated with adverse hepatic effects. Individuals with iron-deficiency anemia should avoid drinking it alongside meals, as catechins inhibit non-heme iron absorption by up to 25–35%. People with cardiovascular conditions, anxiety disorders, or those taking medications metabolized by CYP1A2 enzymes should discuss regular consumption with a clinician.

### What is the best way to brew Nepal Ilam Tea to maximize health benefits?

Brewing Nepal Ilam Tea at 75–85°C (rather than boiling) for 2–3 minutes preserves heat-sensitive catechins like EGCG while minimizing astringency from excess tannin extraction. Using approximately 2–3 grams of loose-leaf tea per 240 mL of water optimizes polyphenol yield; multiple infusions (2–3 steeps) can extract additional catechins from the same leaves. Avoiding milk in the infusion may be beneficial, as casein proteins have been shown in some studies to bind catechins and reduce their bioavailability, though evidence on this interaction remains mixed.

### Does Nepal Ilam Tea contain caffeine, and how does it compare to coffee?

Nepal Ilam Tea contains 2-5% caffeine by dry weight, which typically translates to 25-50 mg per 8 oz cup depending on brewing time and temperature. This is significantly less than coffee, which contains 95-200 mg per cup, making Nepal Ilam Tea a gentler option for those sensitive to caffeine stimulation. The tea also provides theanine, an amino acid that may promote calm alertness by moderating caffeine's effects.

### Is Nepal Ilam Tea safe for pregnant women or children?

Nepal Ilam Tea is generally recognized as safe for children and pregnancy in moderate amounts due to its lower caffeine content compared to coffee, though pregnant women should limit caffeine intake to under 200 mg daily per medical guidelines. Children may tolerate small amounts, but individual tolerance varies; consult a healthcare provider before regular use. No clinical safety studies exist specifically for the Nepal Ilam cultivar, so caution is advised for vulnerable populations.

### Can Nepal Ilam Tea interact with medications or supplements?

Nepal Ilam Tea's caffeine and catechin content may interact with certain medications including blood thinners (due to vitamin K in tea leaves), stimulant drugs, and medications metabolized by the liver. High consumption may also reduce iron absorption when consumed with meals, potentially affecting those with iron-deficiency anemia or taking iron supplements. Consult a healthcare provider if you take regular medications before establishing a daily tea routine.

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